composer is not recognized as an internal or external command in windows server

Question

I am using windows server 2008 os. I downloaded composer setup.exe and installed it on my PC but whenever I try composer install . I getting an error:

'composer' is not recognized as an internal or external command,

eg:-

c:\xampp\htdocs\shop>composer install 
‘composer' is not recognized as an internal or external command, 
operable program or batch file.

My environment variable PATH is shown below:

C:\xampp\php\;C:\Users\Administrator\AppData\Roaming\Composer\vendor\bin

Answer 1

For anyone coming here from Google who are facing the same issue. I installed Composer properly and the Environment variable was set but it just wouldn't work. In my case composer is installed in C:\ProgramData\ComposerSetup\bin and this is exactly what is in my PATH Environment variable. After messing around a bit trying to fix it I saw that under System variables under PATH there is something called PATHEXT I opened that and added ;.PHAR to the end of it. So it ended up like the screenshots mentioned below:

And this is what my PATH is now:
  

I closed all file explorer windows and command prompts and started a new CMD and ran composer --version and it did work so I hope this helps someone facing the same issue as me.